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Install MTB Fork Volume Spacers

Want to increase or decrease the ramp rate on your fork? You can easily modify the ramp rate with volume spacers.

Disclaimer – If you doubt your mechanical ability utilize a professional resource. Suspension is critical to performance and your safety.

This video assumes your fork is in good working condition. If you suspect any issues such as “suck down”, or an over pressurized negative air chamber, it is important you use a qualified resource.

How To Install Volume Spacers

Air down the fork.
You can remove the valve core if you wish to open the system during the service.

Loosen the air valve assembly.
Fox offers chamferless sockets. Available in 32mm

Install ore remove volume spacers.
More volume spacers will increase ramp rate. Less volume spacers will decrease ramp rate (more linear feel).

Refer to manufacturer’s spec for maximum volume spacing. Installing more than the maximum will result in damage and / or injury.

Gently re-thread the air valve assembly. Do not cross thread this system.
In the video you see the system does not want to easily thread together. Occasionally volume spacers won’t clip all the way in place, particularly when new. If the volume spacers are off axis it may keep the threads from easily engaging. Pull the assembly out, remove volume spacers and reinstall. This may realign the system allowing for easy assembly re-installation.

Torque the assembly per manufacture’s spec.

Re-pressurize the fork, check sag and evaluate ramp rate. Ensure proper performance and go ride!

If any of these steps intimidate or confuse you please contact a professional.

Fox Manuals

2020 Fox Float Volume Spacer Maximums

Fox 34 Forks

2020 Fox 34 Volume Spacer Spec

Fox 36 Forks

2020 Fox 36 Volume Spacer Spec

Fox 40 Forks

2020 Fox 40 Volume Spacer Spec

Images / Data ©

Check out how to install volume spacers in your rear shock here.

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